A 4/6 for is already a smidge above the curve, but that constellation effect... wow. BW Constellation might just be a thing in Limited, even with so few enablers; Underworld Coinsmith and Grim Guardian should help with that.

Between Doomwake Giant, Eidolon of Blossoms, Grim Guardian, and Pharika, God of Afflictions, GB Enhantress is looking viable in standard, or at least casual. Nyx Weaver helps as well, and synergizes with Pharika. With enough mana, two Eidolons and Pharika can become a major draw engine.